<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <!-- import CSS -->
    <link rel="stylesheet" href="https://cdn.staticfile.org/element-ui/2.15.9/theme-chalk/index.css">
    <style>
        .el-page-header__content{
            color: white;
            font-weight: bold;
        }
    </style>
</head>
<body>
<div id="app">
    <el-page-header style="background-color: #0095d7;
            color: white;line-height: 60px" @back="goBack" content="修改商品">
    </el-page-header>
    <el-card style="width: 600px;height: 800px;margin: 0 auto">
        <el-form label-width="80px">
            <el-form-item label="商品标题">
                <el-input type="text" v-model="p.title"></el-input>
            </el-form-item>
            <el-form-item label="商品价格">
                <el-input type="text" v-model="p.price"></el-input>
            </el-form-item>
            <el-form-item label="商品原价">
                <el-input type="text" v-model="p.oldPrice"></el-input>
            </el-form-item>
            <el-form-item label="商品销量">
                <el-input type="text" v-model="p.saleCount"></el-input>
            </el-form-item>
            <el-form-item label="商品库存">
                <el-input type="text" v-model="p.num"></el-input>
            </el-form-item>
            <el-form-item label="商品分类">
                <el-select v-model="p.categoryId">
                    <el-option v-for="c in categoryArr"
                               :label="c.name" :value="c.id"></el-option>
                </el-select>
            </el-form-item>
            <el-form-item label="商品图片">
                <img :src="oldUrl" width="100" height="100" v-if="isShow" alt="">
                <el-upload
                        action="/upload"
                        name="pic"
                        limit="1"
                        list-type="picture-card"
                        :on-success="handleSuccess"
                        :on-preview="handlePictureCardPreview"
                        :on-remove="handleRemove">
                    <i class="el-icon-plus"></i>
                </el-upload>
                <el-dialog :visible.sync="dialogVisible">
                    <img width="100%" :src="dialogImageUrl" alt="">
                </el-dialog>
            </el-form-item>
            <el-form-item>
                <el-button type="success" @click="update()">修改商品</el-button>
            </el-form-item>
        </el-form>
    </el-card>


</div>
</body>
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<!-- import Vue before Element -->
<script src="https://cdn.staticfile.org/vue/2.6.14/vue.min.js"></script>
<!-- import JavaScript -->
<script src="https://cdn.staticfile.org/element-ui/2.15.9/index.min.js"></script>
<script>
   let v = new Vue({
        el: '#app',
        data: function() {
            return {
                isShow:true,
                dialogImageUrl: '',
                dialogVisible: false,
                p:{
                    title:"",
                    price:"",
                    oldPrice:"",
                    saleCount:"",
                    num:"",
                    categoryId:"",
                    url:""
                },
                categoryArr:[],
                oldUrl:""
            }
        },
       methods:{
           update(){
             if (v.p.url==""){
                 v.$message.error("请选择上传的图片!");
                 return;
             }
             //发出修改商品的请求
             axios.post("/product/update",v.p).then(function (response) {
                 location.href="/admin.html";
             })

           },
           handleSuccess(response,file,fileList){
               //response代表服务器响应的图片路径
               v.p.url = response;
               v.isShow = false;
           },
           goBack(){
               history.back();//返回上一页面
           },
           handleRemove(file, fileList) {
               v.isShow = true;
               console.log(file, fileList);
               //发出删除图片的请求
               axios.get("/remove?url="+ v.p.url).then(function () {
                   v.$message("服务器图片删除完成");
                   v.p.url="";
               })
           },
           handlePictureCardPreview(file) {
               this.dialogImageUrl = file.url;
               this.dialogVisible = true;
           }
       },
       created:function () {
           //发请求获取分类数据
           axios.get("/category/select").then(function (response) {
               v.categoryArr = response.data;
           })
           //通过id请求需要修改的商品信息
           axios.get("/product/selectById/update"+location.search)
                                            .then(function (response) {
               v.p = response.data;
               v.oldUrl = v.p.url;
           })
       }
    })
</script>
</html>